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Thread: Carb Adjustment's - Honda ATC 70 '84 ( Pic )

  1. #1
    Join Date
    Mar 2006
    Location
    Oregon
    --
    2,471

    Question Carb Adjustment's - Honda ATC 70 '84 ( Pic )

    Hey guy's Having trouble with the Carb adjustments , Just Installed All new Honda Gasket's on the Carb - Ready for tune

    I added a Picture , Would like to know What each Adjustment Does ?

    I have them As - Adjustment # 1 & Adjustment # 2 on the Picture.

    Please Refer to the Adjustment's as #1 or #2 ( No Confusion )

    Also would like to know what are the Stock Setting's on Both Adjustment's ?

    .................................................. .................................

    Their is also a adjustment on the Lower Bowl ( Rear ) - What does it control ?

    .................................................. ....................................

    Any 1 Have a Stock ATC 70 manual ( Small one that comes with ATC ) For Sale ?
    Attached Thumbnails Attached Thumbnails Picture Book 1 081.jpg  
    Last edited by ceaserthethird; 01-10-2007 at 09:53 PM.

  2. #2
    Join Date
    Sep 2006
    Location
    S.E. LA
    --
    700
    Screw no.1 is your AIR/FUEL adjustment.
    Screw no.2 is the PILOT screw adjustment.

    I think most manuals say to start with the PILOT screw around 1 1/8 turns out, and your AIR screw around 2 turns out and adjust slowly from there.

    The screw on the carb bowl drains the bowl of gas.

    '85 Honda 250ES Big Red
    '97 Polaris Sportsman 400 4x4 2-stroke
    '04 EZGO TXT

    Former trikes;

    85 & 86 ATC 250es Big Reds, 200e, 185s, 200s, (2) '84 250r, Yamaha 175 2-stroke, ATC 70, (2) ATC 110, TriZinger 60




    ***GOD BLESS AMERICA AND OUR TROOPS***

  3. #3
    Join Date
    Jan 2003
    Location
    NE Arkansas
    --
    2,344
    Adjustment 1 is the idle adjustment.
    Adjustment 2 is the pilot adustment.
    The screw at the bottom of the bowl is the drain screw.

    When adjusting the idle, just remember to tap the throttle while adjusting to avoid pitting the slide (at least that's what I do).

    For the pilot adjustment, stock is 1 1/2 turns out. To fine tune it, per the manual, have the trike running and warmed up. Start with the 1 1/2 turns out. Slowly turn (very slow, maybe a 1/4 turn at a time and let the motor catch up) the screw in until the motor stalls, then back it out 1 turn.

    I downloaded my manual free from a glamisdunes site, I'll try to find it for ya.

    Good luck,

    Travis
    36 yo, Apple geek, married with kids, conservative. If you are a GUN OWNER and not a member of the NRA, SHAME ON YOU! JOIN!

    Gun control is not about guns, it's about CONTROL!

    My Rags
    85 ATC70,85 ATC70,85 ATC110,83 ATC185S,85 ATC250ES,02 400EX,04 Polaris ATP 500
    Past rags:2000 Scrambler 400, 86 350X, 86 250R, 84 200S, 97 ATK260LQ

  4. #4
    Join Date
    Jan 2003
    Location
    NE Arkansas
    --
    2,344
    36 yo, Apple geek, married with kids, conservative. If you are a GUN OWNER and not a member of the NRA, SHAME ON YOU! JOIN!

    Gun control is not about guns, it's about CONTROL!

    My Rags
    85 ATC70,85 ATC70,85 ATC110,83 ATC185S,85 ATC250ES,02 400EX,04 Polaris ATP 500
    Past rags:2000 Scrambler 400, 86 350X, 86 250R, 84 200S, 97 ATK260LQ

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